Cylinder-driving mechanism for printing-presses



I H. F. BECHMA N. .CYLINDER DRIVINGMECHANISM FOR PRINTING PRESSES.

APPLICATION FILED MAR. 6, I920. 1 359,862, Patented Nov. 23, 1920.

- v 2 SHEETS-SHEET 1.

P "H- Ia, f I I 5 5 H. F. BECHMAN. CYLINDER DRIVING MECHANISM FOR PRINTING PRESSES.

APPLICATION F| LED MAR- 6. N20,.

Patented Nov. 23, 1920. 7

2 SHEETS-SHEET 2- siren stare HENRY n BECI-IMAN, or BATTLE GREEK, 1

COMPANY, OF BATTLE GREEK MICHIGAN, A CORPORATION OF MICI-IIGALL cYLINDEnnnIvInG MECHA T all whom it may concern: 7

Be it lrnownthat I a citizen or". the

tes,

ed Sta residing at Battle Creek, in the (lOllllby ofcejlhounand of l'viichi an, have invented certain new and useful Improvements in Cylindern 1 1 's f" ip. i. writing h ecnanlsm lor 1111 mg losses,

and I hereby declare that the followingis a full, clean and exact description thereoi',

drawings, Whichform part of t tion. V p I The present invention is an improvement in rotary Web printing 1 resses of the singlepage tubularplate type disclosed in my Patents Nos. 867,230, of @ctoher l; 1907, and 1249,0053, of Septemberll, 1917'." In par-c ticular the present invention is an improvement upon the plate driving gearing shown in latent No. 1,233,025 oi April 17 ,1 1917.

The object of the present invention is'ot o provide novel gearing between the plate and impression cylinders which will permit the tubular plates to he slipped on or removed from either or both ends of the platecylin (let-'3 Without having to. remove any gears.

I will explain the invention with reference to the a illustrate one practical eml iodinient thereof,

and then summarize in the claims thejnovel ings .1", Which, in the example shown, are

features of construction and novel coinbinaapplied to the side of the bearings2". These tions of parts for which protection is debearings (see Fig; 3) are shapedsubstan-= sired. v tially as shown in my PatentNoJ 979,919,

In said drawings Figure 1 is a transverse December 27, 1910,so that the tubular plates 3-5 section through part ofa printing press, P can be slipped endwiseover these b83151.

showing in side elevation a plate cylinder 'ingslonto or oli' of the plate cylinder. adapted to carry tubular plates and a coact- The plate cylinder must have aconstant ing impression cylinder ;'and the novel gear-' geared relation with the impression cylinder, ing whereby the cylinders are driven and and therefore 1n orderto enable the plates 40 maintained in constant proper geared peto he placed on or removed froln'the plate ripheral relation. i cylinder at either end I employed gapped' Fig. 2 is a top plan View of Fig. 1. gears'to drive the plate cylinder as disclosed Fig.3 is an enlarged elei ation ofthe gearin my Patent No. 1,233,025, and also pro ing'between the cylinders at the left hand vid'ed means whereby whenthegapped gear end of Figs. land 2. a y at one end of the plate cylinder Was out of Fig. 4 is a similar elevationof the gearing mesh, the gapped gean'at the otherend of between the cylinders at the right hand end the plate cylinder was 1n mesh thus keeplng of Figs. 1 and 2. 1 7 '1 the two cylinders in constantfgeared' rela-- Fig. 5- 's a diagrammatical View illustrattion, as described in my said patent. ing the relation between the gripped-gears at My present lIlVGIltlOH' provides novel-gapopposite ends of the impression HENRY; F. Bremen,

reference being had to the accompanying cconipanying drawings which NISJVL FOR rnrn'rme-rnnssns,

The drawings illustrate onlyffone printing couple; comprising a plate cylinder 1, and a coacting impression-cylinder 2, which in the example shown is twice the diameter ofthe plate cylinder; v f I i p Y Thetrunnionsjof the shafts of the cylinder 2 are journaled in bearings of anyl'suitable" construction, mounted in boxes 2 'on "the side frames F. The cylinder 2 is preig erably laterally adjustable towardand -irom TICHIGAN', ASSIGNOR TO DUPLEX PRINTING V Speeificationof Lstters Patent; Patented'fl'qgv; 23, 1920 2 Application anten ae 1920. Serial 110,3 3,849;

the plate cylinder and the hearings in, the

.-. boxes 2 maybe adjustable inthe Well known manner to regulate the impression pressure plate cylinder 1.

lhe plate cylinderv 1 is adapte 'single page-tubular-plates, such shown'in 'my patents above referred to, andis of small diameter so that suchtubular plates can be slipped endwise on or off the cylinder and orcontact between the cylinder '2 and the d to early I over the bearings which support the cylinder the plate cylinderis adapted to carry four at the ends thereof. "In the example shown -or more tubular plates and therefordthe journal hearings for such plate cylinder, at

each and both ends thereof, are such'thatrthe';

? plates can be slipped endwise over, s'uchb'earing on or oil'the cylinder;

The 'plate cylinder 1 is journ gearingbetween the plate cylinder and the impression cylinder whereby the plate and large stud 3 which may be formed on or, rigidly attached to the outer side of the ad- 7 j acent box 2 ofcylinder 2, in any suitable manner. As shown the stud 3 is fastened to the box 2 by bolts 3 Each stud 3 is eccentric to the shaft 2 of the cylinder 2 and one of the studs. 3 at the drive end of the impression cylinder is provided with a slot or opening 3 for the passage of the cylinder shaft; said slot being sufiiciently large or long to permit of the desired lateral adjustment of the cylinder 2 relative to the cylinder 1.

Eachgear 3 meshes with a gear 4 on the adjacent end of the shaft 4. The gears 3 are of the same diameter as the gears 2 the gears 4 are of the same diameter as the gears i andthe gears 1 are one-half the diameter of the gears 3. VV1th this arrange-v ment and proportion of gears the plate cylinder will be caused to make two revolutions for each revolution of the impression cylinder; the latter being twice the diameter of the plate cylinder; thus the plate and impression cylinders have the same peripheral speeds.

The aims of the shaft. 45 is equidistant from the axis of the impression cylinder shaft 2 and the axes of the impression cylinder driving gears 3; so that the gears 2 and 3are driven in exact time and syncronism; and as the gears 1, 3, and 4, at each end are duplicates, they have the same relative proportional speeds.

. Each gear 3, however, is provided with'a peripheral gap 3 which during each revolution of such gear 3 comes opposite its related gear 1; as indicated in Figs. 4 and 5; the gap then forming space between the gears through which space a tubular plate P can be slipped endwise on or oil? the cylinderover the reduced shank of the plate cylinder bearing. The respective gears 3 at opposite ends of the cylinder 1 arev so set that the aps 3 therein are preferably 180 apart, as indicated in Fig. 5, and consequently at no time can both gears 3 be simultaneously out of mesh with both gears 1; but whenever and while one gear 3 is out of mesh with its related gear 1 0. while the gap insuch gear 3 is opposite or passing such gear 1) the other gear 3 is in mesh with its related gear 1. Consequently at any andall times there isa constant positive driving gear connection maintained between the' impression cylinder 2 and the plate cylinder 1.

When the pressman desires to place plates on the plate cylinder, or to remove plates therefrom (at, .for instance, the left hand side of the press) he turns the cylinders until the gap 3 in'the left side gear 3 comes opposite the related gear1onthe plate cylinder 1 (see Figs. 1 and 5), and while such gap is in the position indicated in Figs. 4 and 5, he can slip the plates on or off the cylinder over the hearing at thatsideof the machine, the plates passingover the gear 1 and between it and the related gear 3 through the gap in such gear 3. At such time the plates could neither be removed from nor applied to the end of the plate cylinder at the right hand side offthe press.

If the operator desires to. put plates on the plate cylinder or remove them therefrom at the right handside of the press he causes the mechanism to rotate the plate cylinder one revolution, which will first bring the gap in the gear 3 at the left hand side of the machine againinto mesh with its related gear 1, and thereafter bring the 1 gap in the gear 3 at the right hand side of the press opposite its related gear 1; then plates can be placed on or-taken off the plate cylinder at the right hand side of the press.

While I have shown in the drawings the plate cylinders as constructed to carry four 7 plates each, any less number of plates may be placed thereon accord ng to the sure of the paper it is desired to print; and, if desired, the plate cylinders may be made long enough'to carry five or more plates. In this form of gearing there is always a fixed driving relation between the plate and impression cylinders which remains constant I regardless of the adjustment of the impression cylinder toward or from theplate cylinder, because the gear 3 is not shifted with,

theimpression cylinder to or fromv the plate cylinder but remains constantly at a fixed distance from the axis. of the plate-cylinder;

and the gear 2 mounted on the impression cylinder has a rolling movement relative to the gear 1, but is not separated therefrom during the adjustment of the impression cylinder.

A further advantage of the present con-' struction over that shown in my aforesaid patent is that there is alwaysa sufficient, re-

liable and positive geared relation between the plate and impression cylinders which results from the fact that the gears 3 are about twice the diameter of the gears 1, instead of being of like size.

Further by having the gears 3 fixed relatively tov the gears 1, and not shifted by the impressionadjustment of cylinder 2, there 18 no variat on of pitch hne mesh between the gears 3 and 1, and consequently no chatter or jar when the gaps in gears 3 are passing the gears 1, thus obviating any and 3 at any possibility of clashing-between the gears l press.

What I claim 1s:..' v I H 1. Ina'prmtmg press the combination of an impression cylinder; a. plate cylinder; a

an axis eccentric to the axis of the impression cylinder; and gearing between the impression cylinder and said eccentric'ally mounted gear, whereby the plate cylinder is'rotated at the same peripheral speed as the impression cylinder.

2. In a printing press the combination side the impression cylinder adapted to'ca'rry single page tubular plates; a gear on the plate cylinder shaft; a peripherally gapped gear meshingwith the plate cylinder gear andmounted beside the end of the impression cylinder on an axis eccentric to the axis of the impress'ion'cylinder; and gearing between the impression cylinder and said eccentrically mounted gear whereby the plate cylinder is rotated at the same peripheral speed as the impression" cylinder.

3. In a printing press, the combination of; a plate cylinder adapted tolcarry tubular plates, a journal'bearing for the plate cylinder whereby such plates may he slipped eudwise on or off the cylinder a gear on the end or the plate cylinder; a gapped gear meshing with the plate cylinder gear, said gapped.

gear being journaled beside the end of the impression cylinder but on an axis eccen-T tric thereto and gearing between the impres sion cylinder and said eccentri'cally mounted gear, whereby-the-platecylinder is rotated at the same. peripheral speed as the impression cylinder.

a. in a printing press the combination of;

. eccentrically mounted gear.

time in the operation of the impression cylinder coacting with the plate cyl nder; a gapped gear meshing witheach] an impresslon cylinder; a plate cylinder be gear meshing with the plate cylinder gear; a journal for said gapped gear mounted ec centric to the axis of the impression cylinder and adjacent theend thereof; said journal surrounding the impression-cylinder shaft; andgeari'ng between the impression cylinderv and'thegapped gear;"substantially as described.

'6. In printing I of aplate cylinder adapted to carrytubular press, the combinationplates; afjournalfbearing for each end of.

the cylinder whereby su'chp'lates may be a gear on each end of the plate cylinder; an

of the platecylinder gears, said gapped gears being journaled beside the ends of the gears-being so disposedthat when either slipped on or oii either end of the cylinder; v

impression cylinder but ejccentrijcthereto; the gapsin the two eccentrically mounted gapped gear is disengaged from itsrelated T plate cylinder gear, the other-gappedgear is inengagement with'its relatedplate cylinder gear.

7. In a printing press, the combination or an impression cylinder; a plate cylinder 0; acting therewith adapted to carry tubular plates ournal bearing ioreachend of the. plate, cylinder whereby such plates ma be slipped on or oil either end of such cylinder;

a gear mounted upon each end of the plate cylinder gapped gearsineshing with 'elated 1 gears on each end of the plate cylinder said gapp edgears being mounted eccentrically of the axis of the impression cylinder and surroundingthe'impression cylinder shaft;

and gearing between the impression cylinder and the gapped gear whereby the plate impression cylinders are rotated at the same; peripheral speed.

lar plates; a journal bearing for each end of the plate cylinder wherebysuch plates v 8. a printing press, the combination of an'impression cylinder; a plate'cylinder coa'ctin'g therewith adapted to-carry tubu-f may be slipped endwise on or off either end. I

of the cylinder; a gear smaller than the journal bearing mounted upon each end of theplate cylinder; a gapped gear meshing with each gear on each end ofthe plate cylinder, said gapped gears being mounted upon studs disposed eccentrically of the axis of the impression cylinder and surrounding the impression cylinder. shaft;

and gearing between the impression cylinder and the said gapped gears whereby the plate and impression cylindersare rotated at the same peripheral speed,

9. In a printing press, the-combination of a plate'cylinder adapted tocarry tubular plates; a journal bearing "for each'end of said cylinder whereby such plates may be Slipped on or off eithe d Such Gym} 130 der; an impression cylinder beside and cogearing between'the counter-shaft and the acting with the plate cylinder; at gapped gear journaled beside each end of the im-- pression cylinder andeccentric to and surrounding the axis thereof;-gearing between said gapped gears and the said impression cylinder; and pinions on each end of the plate cylinder respectively meshing with the opposed adjacent gapped gears; the gapped gears being so disposed that when either gapped gear is disengaged from its related plate cylinder gear, the othergapped gear is inengagement with its related plate cylinder gear.

10. In a printing press; the combination of an impression cylinder; a plate cylinder coacting with the impression cylinder adapted to carry single page tubular plates; journal bearings for the plate cylinder whereby such platesean beslipped end- Wise on or off the plate cylinder over such 7 bearings; a gapped gear meshing with each plate cylinder gear;

of the impressioncylinder and adjacent the ends thereof said ournals surrounding-the impression cyllnder shaft; a counter-shaft;

impression cylinder shaft; and gearing between the countershaft and the gapped ears.

b 11. In a printing press the combination of a plate cylinder adapted to carry tubular plates; journal bearings for each end of the cylinder whereby such plates may be slipped endwise on or off either end of the plate cylinder; an impression cylinder beside and coacting with theplate cylinder; a counter-shaft beside the impression cylinder; gearing between the impression cylinder and said counter-shaft; gapped gears j ournaled' beside each end of the impression cylinder and, eccentric to. and surrounding the axis thereof; gearing between said gapped gears and the said counter-shaft;

journals for: said gapped gears mounted, eccentric to the axis and pinions on each end of the plate cylinder respectively meshing with the opposed,

adjacent gapped gears; the gapped gears being so disposed that when either gapped gear is disengaged from its related plate' cylinder gear the other gapped geariis in engagement with its related plate cylinder gear, substantially as described.

12. In a printing press the combination of an impression cylinder; a plate cylinder beside, the impression cylinder adapted to carry single page tubularplates; gears on the plate cylinder shaft;

peripherallyv gapped gears meshing with the plate cylinder gears and mounted beside the ends of the 1mpress1on cylmder on an axis eccentric to'the axis of the impression cylinder; and

gearing for driving said eccentrically mounted gears to rotate-the platecylinder at the same peripheral speed asthe impression cylinder.

13. In a printing press the combination of a plate cylinder adapted to carry tubular is in engagement with its related plate cyl inder gear; and gearing for driving the gapped gears so as to rotate the plate cylinder at the same peripheral speed as the impression cylinder.

In testimony that I claim the foregoing as my own, I affix my signature. r HENRY F. BECI-IMAN. 

